Analog sound signals are produced by
A) phonograph records.
B) CDs.
C) DVDs.
D) all of the above
E) none of the above
Answer: A
You might also like to view...
A supertrain (rest-length = 100 m) travels at a speed of 0.950c as it passes through a tunnel (rest-length 50.0 m). As seen by a trackside observer, is the train ever completely within the tunnel? If so, by how much?
The San Andreas fault
A) stretches from the Gulf of California to Cape Mendocino, California, and separates the Pacific Plate from the North American Plate. B) accommodates all the motion between the Pacific Plate and the North American Plate. C) is presently inactive. D) all of the above
Spherical mirrors suffer from
A) both spherical and chromatic aberration. B) spherical aberration, but not chromatic aberration. C) chromatic aberration, but not spherical aberration. D) neither spherical nor chromatic aberration.
Parallel-Plate Capacitor: Two large closely-spaced parallel metal plates are uniformly and oppositely charged and the electric field between them is 7.6 × 106 N/C.(a) What is the charge per unit area on each plate?(b) If the plates are now moved two times farther apart, what is the electric field between the plates?
What will be an ideal response?